May be this could be an official thread - a sticky.
Have you heard about Section 508? It is an offshoot of the federal mandate which began as the ADA (American with Disabilities Act). It deals specifically with Internet / Technology access for those of us with disabilities.
Here are a couple of articles of interest for both the general public and developers:
WebAIM: WebAIM Section 508 Checklist
Web Accessibility - Section 508
and the official website: Section 508: The Road to Accessibility
If you use apps that can help those with disabilities please posts reviews and comments and requests for apps here.
IMO, the Android platform is a golden opportunity for developers to make their apps more accessible to the disabled and a golden opportunity to make money.